Got a chance to check out the auger tonight, and it looks pretty awesome, this is definitley the way to go, turning the end of the auger to a round rather than a taper. The only trouble is that improved accuracy has highlighted a slight misalignment problem. Preliminary measurements indicate that I need to take .120" off of the grinder feet to get it lined up right. I could raise the motor and drive that amount , but that's a little more work than just grinding a little off the feet.
This is what she looks like now, the non tapered shaft ensures a square alignment of the coupler on the shaft
He made a dent for one of the two set screws to ride in, like mister omack suggested and you can see where the first attempt chewed up the flat.
He also cut a keyway into it so that we aren't relying on the set screw to hold the torque back.
this is a shot of the other side partially slid on. I am really happy with how this turned out, just have a little work to get it realigned now. As far as extending the horn, I may look into the PVC thing, especially because I have access to the hot boxes for bending it. Would just be a matter of making a pusher.
some of the goodness this thing turned out this weekend.
Many thanks Jeff
Tom